INTEGRATED CIRCUITS
74F245
Octal transceiver (3-State)
Product specification 1994 Nov 15
IC15 Data Handbook
Philips SemiconductorsPhilips Semiconductors Product specification
Octal transceiver (3-State) 74F245
FEATURES PIN CONFIGURATION
Octal bidirectional bus interface
1 20 V
T/R
CC
3-State buffer outputs sink 64mA
2 19
A0 OE
15mA source current
3 18
A1 B0
4 17
Outputs are placed in high impedance state during power-off A2 B1
conditions 5 16
A3 B2
6 15
A4 B3
DESCRIPTION
7 14
A5 B4
The 74F245 is an octal transceiver featuring non-inverting 3-State
8 13
A6
B5
bus compatible outputs in both transmit and receive directions. The
9 12
A7
B port outputs are capable of sinking 64mA and sourcing 15mA,
B6
producing very good capacitive drive characteristics. The device
10 11
GND B7
features an Output Enable (OE) input for easy cascading and
Transmit/Receive (T/R) input for direction control. The 3-State
SF00198
outputs, B0B7, have been designed to prevent output bus loading if
the power is removed from the device.
TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL)
74F245 4.0ns 70mA
ORDERING INFORMATION
COMMERCIAL RANGE
DESCRIPTION DRAWING NUMBER
V = 5V 10%, T = 0C to +70C
CC amb
20-Pin Plastic DIP N74F245N SOT146-1
20-Pin Plastic SO N74F245D SOT163-1
20-Pin Plastic SSOP Type II N74F245DB SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW
A0A7, B0B7 Data inputs 3.5/1.0 70A/0.6mA
OE Output Enable input (active Low) 1.0/2.0 20A/1.2mA
T/R Transmit/Receive input 1.0/2.0 20A/1.2mA
A0A7 A port outputs 150/40 3.0mA/24mA
B0B7 B port outputs 750/106.7 15mA/64mA
NOTE: One (1.0) FAST unit load is defined as: 20A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL IEC/IEEE SYMBOL
19
G3
3EN1 (BA)
23 4 56 7 89
1
3EN1 (AB)
1
A0 A1 A2 A3 A4 A5 A6 A7
2 18
2
19 OE
3 17
1 T/R
4 16
5 15
B0 B1 B2 B3 B4 B5 B6 B7
6 14
7 13
8 12
18 17 16 15 14 13 12 11
9 11
V = Pin 20
CC
GND = Pin 10
SF00199 SF00200
2
November 15, 1994 8530025 14256